WLM

WLM commonly refers to Windows Live Messenger, a Microsoft instant messaging client that was part of the Windows Live set of online services. It evolved from the earlier MSN Messenger and was designed to provide real‑time text chats, presence information, and data exchange across users.

Windows Live Messenger began as MSN Messenger in 1999 and was rebranded to Windows Live Messenger in 2005 as Microsoft grouped its online services under the Windows Live brand. The client offered features such as one‑to‑one and group messaging, file transfers, emoticons, voice and video calling, and integration with Windows Live ID and other Microsoft services. It was available for Windows, with later versions released for macOS and mobile platforms, allowing cross‑device communication.

During its life, WLM competed with other messaging platforms and benefited from tight integration with the Windows ecosystem and the broader online services provided by Microsoft. The service relied on a centralized network to manage contacts and presence, enabling users to see when friends were online and available to chat.

Discontinuation and transition to Skype: Microsoft announced plans to retire Windows Live Messenger in favor of its newer Skype platform. In 2013, Windows Live Messenger was phased out in most regions, and users were encouraged to migrate their accounts to Skype. After the transition, Skype became the primary Microsoft‑owned messaging client, with Messenger features gradually integrated into Skype’s ecosystem.

See also: Skype, Windows Live. Note: WLM as an acronym has other, less common meanings in different contexts, but Windows Live Messenger is the primary association in technology and online communication.